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- Q127 - Navigation Problems: Oceans
105. On 16 July at 2000 zone time, you take a sextant observation of Polaris. Your vessel's DR position is LAT 27°22.0'N, LONG 148°35.0'W, and your sextant reads 26°57.5'. Your chronometer reads 05h 59m 16s, and your chronometer error is 01m 28s slow. Your height of eye is 48 feet, and the index error for your sextant is 1.3' off the arc. What is the latitude of your vessel from your observation of Polaris?
The correct latitude is determined by correcting the sextant altitude for index error and dip, then adding the Polaris correction from the Nautical Almanac. This process accounts for Polaris's position relative to the celestial pole and provides a latitude of 2735.8'N.
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